高强MXene/PPy@BC复合薄膜的制备及其电磁屏蔽性能

唐婕; 李翔

高强MXene/PPy@BC复合薄膜的制备及其电磁屏蔽性能

唐婕,
李翔^,

上海理工大学　材料与化学学院, 上海杨浦 200093

基金项目: 国家自然科学基金(52072245)

详细信息

通讯作者:
李翔，教授，博士，磁性功能材料方向；　E-mail: xiangli@usst.edu.cn

计量
- 文章访问数: 51
- HTML全文浏览量: 35
- 被引次数: 0
出版历程
- 收稿日期: 2024-01-25
- 修回日期: 2024-02-25
- 录用日期: 2024-03-07
- 网络出版日期: 2024-04-13

Preparation of high-strength MXene/PPy@BC composite films and their electromagnetic shielding properties

TANG Jie,
LI Xiang^,

University of Shanghai for Science and Technology, School of Materials and Chemistry, Yangpu, Shanghai, 200093

Funds: National Natural Science Foundation of China (No.52072245)

摘要

摘要: 随着通信技术和移动电子设备的不断发展，电磁干扰问题日益突显，因此研发高性能的电磁屏蔽材料成为当前重要的研究方向。本文采用简单的真空过滤方法，成功制备了高导电性能的MXene/聚吡咯(PPy)@细菌纤维素(BC)薄膜(MPB)，深入研究了MXene和PPy@BC不同比例对复合薄膜导电性能、力学性能和电磁屏蔽性能的影响规律。研究表明:当MXene和PPy@BC比例为3∶1时，电导率和X波段电磁屏蔽效能(EMI SE)均达到最大值，分别1209 S/cm和63.89 dB；此外，由于PPy@BC和MXene之间存在丰富的氢键相互作用，使得复合薄膜的最大抗拉强度可达到24.73 MPa，较纯MXene薄膜提升了近10倍。MPB薄膜优异的综合性能展示了其在下一代智能和可穿戴电子产品的EMI屏蔽方面的巨大潜力。
- MXene /
- 聚吡咯 /
- 细菌纤维素 /
- 电磁屏蔽 /
- 力学性能 /
- 复合薄膜
Abstract: With the continuous development of communication technology and mobile electronic devices, electromagnetic interference problem is increasingly prominent, so the development of high performance electromagnetic shielding materials has become an important research direction. In this paper, a high conductivity MXene/polypyrrole (PPy)@bacterial cellulose (BC) film (MPB) with high conductivity was successfully prepared by a simple vacuum filtration method. The influence of different proportions of MXene and PPy@BC on the conductivity, mechanical properties and electromagnetic shielding performance of the composite film was deeply studied. The results show that when the ratio of MXene and PPy@BC is 3∶1, the conductivity and X-band electromagnetic shielding efficiency (EMI SE) reach the maximum, 1209 S/cm and 63.89 dB, respectively. In addition, due to the rich hydrogen bond interaction between PPy@BC and MXene, the maximum tensile strength of the composite film can reach 24.73 MPa, which is nearly 10 times higher than that of pure MXene film. The excellent comprehensive performance of MPB film shows its great potential in the EMI shielding of the next generation of intelligent and wearable electronic products.
- MXene /
- polypyrrole /
- bacterial cellulose /
- electromagnetic shielding /
- mechanical property /
- composite film

HTML全文

图 1 MXene/聚吡咯(PPy)@细菌纤维素(BC) (MPB)薄膜的制备流程图

Figure 1. Flow chart for the preparation of MXene/polypyrrole (PPy)@bacterial cellulose (BC) (MPB) films

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图 2 (a)纯BC的TEM照片;(b)纯BC的SEM照片;(c)PPy@BC的TEM照片;(d)Ti₃C₂T_x多层的SEM照片;(e)MPB的TEM照片;(f)MPB的SEM照片

Figure 2. (a) TEM image of pure BC; (b) SEM image of pure BC; (c) TEM image of PPy@BC; (d) SEM image of Ti₃C₂T_x multilayer; (e) TEM image of MPB; (f) SEM image of MPB

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图 3 MPB薄膜的EDS能谱图

Figure 3. EDS mapping images of MPB film

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图 4 MXene，PPy@BC和MPB的XRD图

Figure 4. XRD patterns of MXene, PPy@BC and MPB

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图 5 (a)纯MXene和MPB薄膜的XPS全谱图;(b)PPy@BC的N 1 s高分辨XPS谱图

Figure 5. (a) XPS full spectra of pure MXene and MPB films; (b) N 1 s high-resolution XPS spectra of PPy@BC

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图 6 (a) MPB薄膜的拉伸应力-应变曲线; (b) MPB薄膜的抗拉强度

Figure 6. (a) Tensile stress-strain curve of MPB film; (b) Tensile strength of MPB film

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图 7 MPB薄膜的电阻率变化

Figure 7. Resistivity variation of MPB film

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图 8 MPB 薄膜集成电路点亮 LED 灯的数码照片

Figure 8. Digital photo of MPB film IC lighting up an LED lamp

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图 9 不同 MXene和PPy@BC比例的MPB复合薄膜电磁屏蔽效能(EMI SE)(a)，反射损耗(SE_R)，吸收损耗(SE_A)和总电磁屏蔽效能(SE_T)(b)，R-A-T系数(c)

Figure 9. Electromagnetic shielding effectiveness (EMI SE) (a), reflection loss (SE_R), absorption loss (SE_A) and total electromagnetic shielding effectiveness (SE_T) (b), and R-A-T coefficients (c) of MPB composite films with different MXene and PPy@BC ratios

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图 10 其他EMI屏蔽膜的电磁屏蔽性能比较

Figure 10. Comparison of electromagnetic shielding performance of other EMI shielding films

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图 11 MPB薄膜的电磁屏蔽机制图

Figure 11. Electromagnetic shielding mechanism diagrams of MPB films

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